Modular display stand



FIG. 1 is a perspective view of a modular display stand showing my design;

FIG. 2 is a side elevational view thereof the opposite side being identical; and,

FIG. 3 is a top view thereof; the bottom view being a mirror image thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a modular display stand, as shown and described. 